Consolidated Statements of Cash Flows - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020
Cash flows from operating activities:
Net income	$ 471.0	$ 252.7	$ 257.8
Adjustments to reconcile net income to net cash provided by operating activities:
Share-based compensation expense	209.3	222.6	190.2
Depreciation, amortization, and accretion	217.7	237.4	212.4
Operating lease assets expense	40.3	44.9	42.3
Gain on divestiture	(45.8)	0.0	0.0
Loss from equity method investment	4.8	0.0	0.0
Loss on extinguishment of debt	0.0	60.6	55.0
Deferred income taxes	(222.5)	71.7	(52.3)
Other	(2.6)	(1.1)	(2.9)
Changes in operating assets and liabilities, net of acquisitions:
Accounts receivable, net	(232.0)	(31.8)	(76.1)
Prepaid expenses and other assets	(658.0)	(310.0)	(117.8)
Accounts payable	67.4	0.2	56.0
Accrued compensation	(23.1)	70.3	38.7
Income taxes payable	21.1	24.3	(57.2)
Other accrued liabilities	(1.6)	(80.8)	4.4
Deferred revenue	251.6	128.7	61.5
Net cash provided by operating activities	97.6	689.7	612.0
Cash flows from investing activities:
Purchases of property and equipment	(105.1)	(100.0)	(100.4)
Proceeds from divestiture, net	89.1	0.0	0.0
Purchases of available-for-sale debt securities	(104.1)	(649.8)	(967.0)
Proceeds from sales of available-for-sale debt securities	118.2	546.1	360.4
Proceeds from maturities and redemptions of available-for-sale debt securities	390.3	394.0	865.0
Purchases of equity securities	(16.5)	(10.1)	(17.4)
Proceeds from sales of equity securities	47.7	25.6	9.7
Proceeds from Pulse note receivable	0.0	0.0	50.0
Payments for business acquisitions, net of cash and cash equivalents acquired	0.0	(182.6)	(438.1)
Subsequent payments related to acquisitions in prior years	(14.6)	(10.1)	(45.9)
Other	2.5	0.7	(5.2)
Net cash provided by (used in) investing activities	407.5	13.8	(288.9)
Cash flows from financing activities:
Repurchase and retirement of common stock	(315.2)	(443.5)	(381.1)
Proceeds from issuance of common stock	57.2	56.4	54.7
Payment of dividends	(270.4)	(259.1)	(264.1)
Payment of debt	0.0	(423.8)	(376.2)
Issuance of debt, net	0.0	0.0	792.4
Payment for debt extinguishment costs	0.0	(58.3)	(52.9)
Other	0.0	(3.4)	4.8
Net cash used in financing activities	(528.4)	(1,131.7)	(222.4)
Effect of foreign currency exchange rates on cash, cash equivalents, and restricted cash	(21.7)	(12.1)	5.8
Net (decrease) increase in cash, cash equivalents, and restricted cash	(45.0)	(440.3)	106.5
Cash, cash equivalents, and restricted cash at beginning of period	942.7	1,383.0	1,276.5
Cash, cash equivalents, and restricted cash at end of period	897.7	942.7	1,383.0
Supplemental disclosures of cash flow information:
Cash paid for interest, net of amounts capitalized	67.3	62.6	87.2
Cash paid for income taxes, net	253.2	113.2	84.1
Non-cash investing activity:
Equity method investment	$ 40.3	$ 0.0	$ 0.0